Why don’t Gemini 3 preview models work in the Playground?

Gemini 3 preview models are only available in the global region. If your LLM connection is set to another region, model calls from the Playground will fail.

How to fix it

1. Go to Project Settings → LLM Connections.
2. Edit (or create) your Google LLM connection.
3. Set the region to global and save.

See LLM Connections for setup details.